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Soil slope stability analysis method based on limit equilibrium theory and stress analysis

A technique of limit equilibrium theory and stress analysis, used in excavation, infrastructure engineering, construction, etc.

Active Publication Date: 2009-08-26
昌泰建设集团有限公司
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Problems solved by technology

Similarly, this method is only suitable for slope stability analysis where the position and shape of the sliding surface are basically determined.

Method used

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  • Soil slope stability analysis method based on limit equilibrium theory and stress analysis
  • Soil slope stability analysis method based on limit equilibrium theory and stress analysis
  • Soil slope stability analysis method based on limit equilibrium theory and stress analysis

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Embodiment Construction

[0104] The main points of the present invention can be summarized as follows: 1, soil strip division: the soil strip division is realized step by step in the calculation process, rather than having divided before calculation (different from various methods in the prior art for soil strips) division method): the soil strip interface is an inclined plane, and the angle between it and the vertical line is a function of the weighted average value of the internal friction angle of each soil layer along the soil strip interface.

[0105] 2. Basic assumptions: (1) The normal stress and shear stress of the soil strip interface and the bottom surface are linearly distributed; (2) At the intersection of the soil strip interface and the bottom surface, the normal stresses acting on the soil strip interface and the bottom surface are equal in magnitude; ( 3) The stress state of the soil strip interface and the bottom surface can reach the limit equilibrium state at the same time, that is, ...

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Abstract

The present invention discloses a soil slope stability analysis method based on limit equilibrium theory and stress analysis, wherein the method comprises the following steps: 1) respectively preinstalling two slip surface starting points on the slope base and the next-to-top position of slope; 2) preinstalling a plurality of slip surface starting points on natural interface of slope between the two slip surface starting points; 3) setting the preinstalled safety factor corresponding with each slip surface starting point, and calculating out the critical slip surface corresponding to each slip surface starting point through calculating the found preinstalled safety factor satisfying the condition; and 4) selecting the critical slip surface with least preinstalled safety factor as the critical slip surface of whole soil slope, wherein the least preinstalled safety factor is used as the stability safety factor of whole slope. The soil slope stability analysis method of the invention has the following beneficial effects: (1) no requirement for pre-supposing the shape or position of slip surface, and only requirement for supposing the starting point position of slip surface (namely the position of so-called slip surface shear crack); and (2) translation of problem for searching the critical slip surface to the problem for searching the position of critical shear crack, and overcoming the problems of leaked solution or a plurality of solutions in the traditional method.

Description

technical field [0001] The invention relates to a soil slope stability analysis technology, in particular to a soil slope stability analysis method based on limit equilibrium theory and stress analysis. Background technique [0002] In soil mechanics, slope stability analysis was developed simultaneously with the other two branches, earth pressure and foundation bearing capacity. The method of Coulomb and Rankine's analysis of earth pressure was later extended to the analysis of foundation bearing capacity and slope stability, which is the limit equilibrium method. In the analysis of soil slope stability, although there are other methods such as finite element, the limit equilibrium method is favored by many engineering technicians and researchers because of its simple theory, clear concept and easy grasp. [0003] The calculation steps of the classic limit equilibrium method can be summarized into two steps: first, assuming a slip surface, and calculating the safety factor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20
Inventor 王俊杰刘涛柴贺军林新
Owner 昌泰建设集团有限公司
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